Armchair



FIG. 1 is a front perspective view of an armchair showing my design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof, the side of the armchair not shown is a mirror image of the side shown in this view;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a rear elevational view thereof. 

The ornamental design for an armchair, as shown and described. 